Stopping device for yarn winding machines



Oct 8, 19384 J. s. M ALISTER ET AL 2,133,711

I STOPPING DEVICE FOR YARN WINDING MACHINES Filed Dec. 11, 1956 2 Sheets-Sheet 1 v ATTORNEYS Oct 1938- J. s. M ALISTER ET AL STOPPING DEVICE FOR YARN WINDING MACHINES Filed Dec. 11, 1936 2 SheetsSheet 2 INVENTOR BY 6 mm xi MW ATTORNEYj Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE STOPPING DEVICE FOR YARN WINDING MACHINES see Application December 11, 1936, Serial No. 115,300

9 Claims.

This invention relates to a stopping device for yarn winding machines and has for its primary object the provision of yarn actuated means for stopping the winding of yarn onto the winding cone, or similar device onto which the yarn is wound, before enlargements in the yarn are wound onto the cone, thereby enabling the operator to examine the enlargements.

These enlargements are usually in the form of knots and slubs or tangles occurring in the manufacture of the yarn, and while some of these do not need correction or elimination, others do. However, our invention operates to stop the cone under control of any enlargements so that the operator may examine the knots to see if they are too large and need tightening, or to see if a slub should be removed.

Another object of our invention resides in the provision of an arrangement enabling ready accessibility of the enlargement to the operator to facilitate examination and correction thereof.

Other objects have to do with certain details of construction, rendering the device positive in action although very sensitive and enabling it to be readily applied to winding machines of standard construction.

How the foregoing together with such other objects and advantages as may hereinafter appear or are incident to our invention are realized, is illustrated in preferred form in the accompanying drawings, wherein- Figure l is a fragmentary end view, partly in section, of a yarn winding machine embodying a device constructed in accordance with my invention; and

Figure 2 is an enlarged elevational view illustrating the device and certain associated parts of the yarn winding machine.

In the drawings we have illustrated our device as applied to a cone yarn winding machine of well known construction in which a winding cone 3 rests for drive on a driving roll 4 mounted in suitable bearings carried by the frame 5 of the machine. The winding cone 3 is rotatably mountconstruction, and intended to but not always effective to remove slubs, then upwardly over a glide pulley 2I, then downwardly and under a guide member 22, then through a traverse member 23 and finally onto the winding cone 3.

Our improved device for stopping the cone under control of the yarn is indicated as a whole at A and is located at a point in the run of yarn between the usual slub catcher and the pulley 2 I, it being pointed out that the pulley 2| is located a considerable distance above the device for purposes hereinafter appearing.

The device A comprises in general a pendent lever 24, pivoted at on a bracket 26 mounted. on the framing 5 of the machine, and a trip device B associated with the lever 24 at its lower end portion. A roller 21 is carried by the bracket 26 and is so located that the run of yarn engages it. A similar roller 28 is carried by the pendent lever 24 to cooperate with the roller 21 and contact the yarn so that the yarn runs between the rollers 21 and 28. The construction of the lever 24 and the location of the pivot 25 are such that with the device as shown in Figure 2, the roller 28 is being urged against the yarn due to the tendency of the lever to move toward its position of true pendency.

In this position of the lever the catch member 29 which is carried thereby at its lower free end portion is positioned so that the trip arm 30 is held in non-tripping position as shown. The trip arm 30 is pivotally mounted at 3I on a bracket 32.

Referring to Figure 1 in which the parts are shown in the position they assume when yarn is being Wound onto the cone 3, it will be seen that the cone has been moved into driving contact with the roll 4 by the operating bar 9; that the plate I4 is held in the position shown by the ratchet teeth III; and that the catch I6 is held out of the path of the oscillating member I! by means of a weighted arm 33 which rests on the trip arm 3!] (see Figure 2). In the absence of certain defects in the yarn and if the thread does not break, winding of the yarn will continue until the operating bar 9 is moved to remove the cone 3 from the driving roll or until the power is shut off. However, if there are defects in the yarn such as knots and slubs or tangles, winding of thread onto the cone is automatically stopped by the device A in the following manner.

Assuming that an enlargement such as a knot or slub has passed the slub catcher 29, this in passing between the rollers 21 and 28 moves the roller 28 tothe right thus causing the lever 242.

with its catch member 29 to swing to the right and release the trip arm 30. When the trip arm is released the weighted arm 33 swings downwardly to the position indicated in dot-and-dash lines at 33a and moves the pivoted catch Hi to the position indicated in dot-and-dash lines at lBa, so that it is in the path of the oscillating member ll. This member then carries the catch 16 with it to the position indicated at 16b and moves the plate I4 to the position indicated at Ma. Since the member ll carried by the plate 14 is in engagement with a tooth of the ratchet bar 9, the lower arm la of the lever device 1 rocks to the right and the upper arm lb rocks upwardly lifting the winding cone 3 out of contact with the driving roll 4 and this causes the cone to stop.

There is a certain amount of momentum in rotating parts which carries the enlargement on past the device A after the trip has been released and in order to prevent the enlargement from being wound onto the cone 3 I have provided the upper guide pulley 2| and have located it a considerable distance above the device A. The location of this guide pulley is important in order to facilitate inspection of and access to the defect in the yarn and, therefore, the distance that the pulley is located above the device A is so calculated that by the time movement of the yarn ceases the enlargement will have reached a position in the run of the yarn Where it is readily accessible to the operator for inspection or correction.

The device is very sensitive, it being noted that the point of contact with the rollers is relatively near the pivot of the pendent lever and that the lever is of considerable length so that a very small movement of. the roller 28 causes a much larger movement of the trip catch 29 whereby very positive action is ensured. Thus both large and small slubs or knots Will cause the Winding operation to stop to enable inspection, and if a slub is found to be so small as to be unobjectionable or if a knot is found to be sufficiently tight, winding may be resumed Without making a correction, and if too large correction or elimination may be made.

We have also associated means with the device A whereby it will cause winding to stop in the event that the thread breaks, as shown in Figure 2, and comprising a lever 35, preferably in the form of a wire pivoted at 36 and having an upper arm 37 and a shorter lower arm 38. The longer arm 31 carries a guide member 39 at its free end which rests against the yarn so that normally the lever 35 assumes the position shown. When the yarn breaks the lever 35 swings in a counterclockwise direction due to the overweight of the upper arm 31, and then the lower arm 38 strikes the lever 24 moving it to the right and releasing the trip device B to stop the winding cone in the manner above described.

We claim:

1. In a yarn winding machine, a driving roll, a winding cone driven thereby, mounting means normally holding said cone in driving contact with the roll, said means being adapted to lift the cone out of. driving contact with the roll, means for guiding a run of yarn to said cone, a lever pivotally supported adjacent said run of yarn, a member carried by said lever in contact with said run of yarn, an oscillating member for imparting lifting movement to said mounting means, latch means having a portion in ratchet engagement with said mounting means and a portion normally out of the path of the oscillating member, a trip device having a portion cooperating with a portion of said lever and adapted to be tripped when an enlargement in the yarn engages said contact member, and a member carried by said latch means adapted to be actuated by the trip device when it is tripped to move the latch means into the path of said oscillating member.

2. In a yarn winding machine the combination of a winding cone, means for guiding a run of.

yarn to said winding cone, a fixed support; a lever suspended from said support, means on said lever engaging said run of yarn and adapted to cause movement of said lever when an enlargement in the yarn comes in contact therewith, trip means engageable with a portion of said lever adapted to be released upon such movement of the lever, and means in engagement with the trip means for stopping the winding cone when the trip means is released, said guiding means including a guide member over which the yarn passes positioned to provide a substantial run of yarn between the yarn engaging means and the winding cone.

3. In a yarn winding machine, a yarn operated trip mechanism comprising a pendent lever, a yarn contacting member carried by the lever, a catch member carried by the lever adjacent its free end portion and a trip arm normally held in non-tripping position by said catch member, said trip arm being released to tripping position when a condition in the yarn causes said contacting member to move said lever out of pendency.

4. In a yarn winding machine, a yarn operated trip mechanism comprising a substantially vertically disposed lever pivoted at its upper portion, a member positioned on said lever so as to contact the yarn, and tripping means associated with said lever at its lower portion normally held in non-tripping position by the lever and adapted to be released when a condition in the yarn causes the contact member to effect movement of the lever.

5. In a yarn winding machine, a winding cone, a yarn operated trip mechanism comprising a pendent lever, a fixed support on which said lever is pivoted, a run of yarn leading to said winding cone, a guide roller for the thread mounted on a fixed axis, a cooperating guide roller carried by said lever, said run of yarn passing between I said rollers, and trip means associated with the lever at its lower free end portion adapted to be tripped when an enlargement in the yarn passes between the rollers. V

6. In a yarn winding machine, a winding cone, a substantially vertically disposed lever pivoted at its upper portion, trip means associated with said lever at its lower portion, and means adjacent the pivot of the lever actuated by the yarn where irregularities occur therein to move the lever to trip said trip means.

7. In a yarn winding machine, a yarn operated trip mechanism comprising a substantially vertically disposed lever pivoted at its upper portion, means adjacent said pivot adapted to contact the yarn and cause movement of the lever when an enlargement in the yarn engages said means, and tripping means associated with said lever at its lower portion normally held in nontripping position by the lever'and adapted to be released when an enlargement in the yarn causes said contact means to move the lever.

8. In a yarn winding machine, a yarn operated trip mechanism comprising a suspended lever, a

pivot for suspending saidlever, a yarn contacting member carried by the lever adjacent said pivot, and tripping means associated with saidlever at its lower portion normally held in non-tripping position by the lever and adapted to be released when a condition in the yarn causes said yarn contacting member to effect movement of said 10 pendent lever, a fixed support on which said lever is pivoted, a run of yarn leading to said winding cone, guide means for the thread carried by said fixed support, cooperating guide means carried by said lever, said run of. yarn passing between said two guide means, and trip means associated with the lever at its lower portion adapted to be tripped when an enlargement in the yarn passes between said two guide means.

JAMES S. MCALISTER.

ERNST C. SHERMAN. 

